1 // SPDX-License-Identifier: GPL-2.0
3 * host.c - DesignWare USB3 DRD Controller Host Glue
5 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com
7 * Authors: Felipe Balbi <balbi@ti.com>,
10 #include <linux/acpi.h>
11 #include <linux/platform_device.h>
13 #include "../host/xhci-plat.h"
16 static const struct xhci_plat_priv dwc3_xhci_plat_priv = {
17 .quirks = XHCI_SKIP_PHY_INIT,
20 static int dwc3_host_get_irq(struct dwc3 *dwc)
22 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
25 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
29 if (irq == -EPROBE_DEFER)
32 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
36 if (irq == -EPROBE_DEFER)
39 irq = platform_get_irq(dwc3_pdev, 0);
50 int dwc3_host_init(struct dwc3 *dwc)
52 struct property_entry props[4];
53 struct platform_device *xhci;
56 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
59 irq = dwc3_host_get_irq(dwc);
63 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
65 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
68 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
72 dwc->xhci_resources[1].start = irq;
73 dwc->xhci_resources[1].end = irq;
74 dwc->xhci_resources[1].flags = res->flags;
75 dwc->xhci_resources[1].name = res->name;
77 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
79 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
83 xhci->dev.parent = dwc->dev;
84 ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(dwc->dev));
88 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
89 DWC3_XHCI_RESOURCES_NUM);
91 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
95 ret = platform_device_add_data(xhci, &dwc3_xhci_plat_priv,
96 sizeof(dwc3_xhci_plat_priv));
100 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
102 if (dwc->usb3_lpm_capable)
103 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
105 if (dwc->usb2_lpm_disable)
106 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
109 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
110 * where Port Disable command doesn't work.
112 * The suggested workaround is that we avoid Port Disable
115 * This following flag tells XHCI to do just that.
117 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
118 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
121 ret = platform_device_add_properties(xhci, props);
123 dev_err(dwc->dev, "failed to add properties to xHCI\n");
128 ret = platform_device_add(xhci);
130 dev_err(dwc->dev, "failed to register xHCI device\n");
136 platform_device_put(xhci);
140 void dwc3_host_exit(struct dwc3 *dwc)
142 platform_device_unregister(dwc->xhci);